BLUSUN 021M Nubuck Smooth Leather Boot Anthracite
Brand: Blusun
Secure your pair of the new BLSN-021M men's barefoot boot in anthracite. Handcrafted in Portugal and delivered direct to your door as soon as our shipment arrives in mid-October.
Status: Pre-order open now.
Estimated Delivery: Mid-October 2026. Free UK delivery on orders over £130.
The Blusun BLSN-021M is a men's lace-up barefoot boot handcrafted in Portugal from water-repellent, Terracare®-certified nubuck and smooth leather in anthracite grey, with a softly padded smooth leather shaft for everyday comfort. Its cold-lined OnSteam® microfibre lining actively manages your foot climate, while the flat, flexible zero-drop TPU sole lets your feet move the way nature intended.
Key Features- Anatomical wide toe box: Gives your toes plenty of room to splay naturally for stable footing and healthy posture
- Terracare®-certified German leather: Sustainably tanned nubuck and smooth leather in anthracite that is highly water-repellent and weather-resistant
- Cold-lined OnSteam® climate control: Breathable microfibre lining wicks moisture and regulates temperature, keeping feet comfortable in colder weather without overheating
- Removable 4mm barefoot insole: OnSteam® insole with thermal insulation you can remove for extra width or a more grounded feel
- Flat flexible TPU sole: 4mm base with a 2mm tread for excellent ground feel and reliable grip on wet surfaces
- Zero-drop construction: Completely flat from heel to toe to encourage upright posture and balanced spinal alignment
- Padded lace-up shaft: Softly padded smooth leather shaft with secure lacing for a comfortable, custom fit around the ankle
- Ethical European craftsmanship: Handcrafted under fair conditions in a family-run workshop in Portugal
| Feature | Specification |
| Upper | Water-repellent Terracare®-certified nubuck and smooth leather in anthracite (German origin), softly padded smooth leather shaft |
| Lining | Breathable OnSteam® microfibre (cold-lined climate control) |
| Insole | Removable 4mm OnSteam® barefoot insole with thermal insulation |
| Outsole | Flexible, grippy TPU sole (4mm base + 2mm tread) |
| Fastening | Lace-up boot with padded leather shaft |
| Drop | 0mm (zero-drop) |
| Origin | Handcrafted in Portugal |
| Care | No impregnation needed before first wear. Brush dry or clean with warm water; air dry. No soap. Re-grease if visible wear marks appear |
Powered by the BarefootBrit Fit System™
Measure your foot length and width in millimetres and compare with the internal shoe measurements below. As a general recommendation, we suggest adding 10-12mm of comfort room to your foot length for the ideal barefoot fit.
Men's Sizing| EU | UK | Inner Length (mm) | Inner Width (mm) |
| 40 | 6.5 | 264 | 95 |
| 41 | 7.5 | 271 | 97 |
| 42 | 8 | 278 | 101 |
| 43 | 9 | 283 | 103 |
| 44 | 9.5 | 292 | 104 |
| 45 | 10.5 | 298 | 105 |
| 46 | 11 | 305 | 107 |
Blusun lasts are shaped to adapt to your foot's natural volume in both length and width. Choose the size that comfortably accommodates your foot at its widest point.
Sizing & Fit
Powered by the BarefootBrit Fit System™
- Men's EU Sizing: Available from EU 40 to EU 46 (UK 6.5 to UK 11).
- Fit Profile: Wide, foot-shaped anatomical toe box that allows your toes to splay naturally with zero compression.
- Sizing Recommendations: Measure your foot length and width in millimetres. We recommend adding 10-12mm to your foot length for the ideal barefoot fit as a general recommendation.
- Volume & Last: Blusun lasts are shaped to adapt naturally to your foot's volume in both length and width. Choose the size that comfortably accommodates your foot at its widest point.
- Pre-Order Note: This boot is on pre-order with estimated delivery in mid-October.
Materials & Care
- Upper: Water-repellent Terracare®-certified nubuck and smooth leather in anthracite (German origin), softly padded smooth leather shaft
- Lining: Breathable OnSteam® microfibre (cold-lined climate control)
- Insole: Removable 4mm OnSteam® barefoot insole with thermal insulation
- Outsole: Flexible, grippy TPU sole (4mm base + 2mm tread), made in Portugal
- Fastening: Lace-up boot with padded leather shaft
- Drop: 0mm (True Zero-Drop)
- Origin: Handcrafted under fair conditions in a family-run Portuguese workshop
No Impregnation Needed: The leather arrives pre-treated from the factory and does not require waterproofing spray before first wear.
Cleaning: Brush dry or clean with warm water; air dry. No soap.
Drying: Allow boots to air dry naturally at room temperature away from direct heat sources.
Conditioning: Re-grease if visible wear marks appear. Avoid harsh cleaning solvents.
About the Brand
Blusun is a Portuguese barefoot footwear brand crafting premium minimalist shoes with a commitment to natural movement, sustainability, and ethical European production. Handcrafted in a family-run workshop in Portugal under fair conditions, every pair features a true zero-drop sole, wide anatomical toe box, and highly flexible construction - designed to give your feet complete freedom to move naturally.
From everyday sneakers to water-repellent boots, Blusun uses certified European materials, German-engineered soles, and sustainable leathers to create barefoot footwear that never compromises on style or foot health.
Product Specifications
- Zero Drop: Yes
- Toe Box Shape: Foot-shaped
- Flexibility: High
- Sole Thickness: 6.0mm
- Water Resistance: Water-resistant
BLUSUN 021M Nubuck Smooth Leather Boot Anthracite
Powered by the BarefootBrit Fit System™
Blusun 021
Good for wide feet
Enter your longest foot length and we'll recommend the best size for this specific shoe.
| EU Size | UK Size | Insole (cm) | Width (cm) |
|---|---|---|---|
| 40 | 6.5 | 26.4 | 9.5 |
| 41 | 7.5 | 27.1 | 9.7 |
| 42 | 8 | 27.8 | 10.1 |
| 43 | 9 | 28.3 | 10.3 |
| 44 | 9.5 | 29.2 | 10.4 |
| 45 | 10.5 | 29.8 | 10.5 |
| 46 | 11 | 30.5 | 10.7 |
Frequently Bought Together
BLUSUN 021M Nubuck Smooth Leather Boot Anthracite
£164.99
This item
Aira Basics Barefoot White Crew Sock
£11.00
Maro Organic Cotton Crew Toe Socks
£12.00
Maro Organic Cotton No Show Toe Socks
£12.00
Description
Pre-Order Now - Estimated Delivery Mid-October
Secure your pair of the new BLSN-021M men's barefoot boot in anthracite. Handcrafted in Portugal and delivered direct to your door as soon as our shipment arrives in mid-October.
Status: Pre-order open now.
Estimated Delivery: Mid-October 2026. Free UK delivery on orders over £130.
The Blusun BLSN-021M is a men's lace-up barefoot boot handcrafted in Portugal from water-repellent, Terracare®-certified nubuck and smooth leather in anthracite grey, with a softly padded smooth leather shaft for everyday comfort. Its cold-lined OnSteam® microfibre lining actively manages your foot climate, while the flat, flexible zero-drop TPU sole lets your feet move the way nature intended.
Key Features
- Anatomical wide toe box: Gives your toes plenty of room to splay naturally for stable footing and healthy posture
- Terracare®-certified German leather: Sustainably tanned nubuck and smooth leather in anthracite that is highly water-repellent and weather-resistant
- Cold-lined OnSteam® climate control: Breathable microfibre lining wicks moisture and regulates temperature, keeping feet comfortable in colder weather without overheating
- Removable 4mm barefoot insole: OnSteam® insole with thermal insulation you can remove for extra width or a more grounded feel
- Flat flexible TPU sole: 4mm base with a 2mm tread for excellent ground feel and reliable grip on wet surfaces
- Zero-drop construction: Completely flat from heel to toe to encourage upright posture and balanced spinal alignment
- Padded lace-up shaft: Softly padded smooth leather shaft with secure lacing for a comfortable, custom fit around the ankle
- Ethical European craftsmanship: Handcrafted under fair conditions in a family-run workshop in Portugal
Specifications
| Feature | Specification |
| Upper | Water-repellent Terracare®-certified nubuck and smooth leather in anthracite (German origin), softly padded smooth leather shaft |
| Lining | Breathable OnSteam® microfibre (cold-lined climate control) |
| Insole | Removable 4mm OnSteam® barefoot insole with thermal insulation |
| Outsole | Flexible, grippy TPU sole (4mm base + 2mm tread) |
| Fastening | Lace-up boot with padded leather shaft |
| Drop | 0mm (zero-drop) |
| Origin | Handcrafted in Portugal |
| Care | No impregnation needed before first wear. Brush dry or clean with warm water; air dry. No soap. Re-grease if visible wear marks appear |
Size Guide
Powered by the BarefootBrit Fit System™
Measure your foot length and width in millimetres and compare with the internal shoe measurements below. As a general recommendation, we suggest adding 10-12mm of comfort room to your foot length for the ideal barefoot fit.
Men's Sizing
| EU | UK | Inner Length (mm) | Inner Width (mm) |
| 40 | 6.5 | 264 | 95 |
| 41 | 7.5 | 271 | 97 |
| 42 | 8 | 278 | 101 |
| 43 | 9 | 283 | 103 |
| 44 | 9.5 | 292 | 104 |
| 45 | 10.5 | 298 | 105 |
| 46 | 11 | 305 | 107 |
Blusun lasts are shaped to adapt to your foot's natural volume in both length and width. Choose the size that comfortably accommodates your foot at its widest point.
Sizing & Fit
Powered by the BarefootBrit Fit System™
- Men's EU Sizing: Available from EU 40 to EU 46 (UK 6.5 to UK 11).
- Fit Profile: Wide, foot-shaped anatomical toe box that allows your toes to splay naturally with zero compression.
- Sizing Recommendations: Measure your foot length and width in millimetres. We recommend adding 10-12mm to your foot length for the ideal barefoot fit as a general recommendation.
- Volume & Last: Blusun lasts are shaped to adapt naturally to your foot's volume in both length and width. Choose the size that comfortably accommodates your foot at its widest point.
- Pre-Order Note: This boot is on pre-order with estimated delivery in mid-October.
Materials & Care
- Upper: Water-repellent Terracare®-certified nubuck and smooth leather in anthracite (German origin), softly padded smooth leather shaft
- Lining: Breathable OnSteam® microfibre (cold-lined climate control)
- Insole: Removable 4mm OnSteam® barefoot insole with thermal insulation
- Outsole: Flexible, grippy TPU sole (4mm base + 2mm tread), made in Portugal
- Fastening: Lace-up boot with padded leather shaft
- Drop: 0mm (True Zero-Drop)
- Origin: Handcrafted under fair conditions in a family-run Portuguese workshop
No Impregnation Needed: The leather arrives pre-treated from the factory and does not require waterproofing spray before first wear.
Cleaning: Brush dry or clean with warm water; air dry. No soap.
Drying: Allow boots to air dry naturally at room temperature away from direct heat sources.
Conditioning: Re-grease if visible wear marks appear. Avoid harsh cleaning solvents.
About the Brand
Blusun is a Portuguese barefoot footwear brand crafting premium minimalist shoes with a commitment to natural movement, sustainability, and ethical European production. Handcrafted in a family-run workshop in Portugal under fair conditions, every pair features a true zero-drop sole, wide anatomical toe box, and highly flexible construction - designed to give your feet complete freedom to move naturally.
From everyday sneakers to water-repellent boots, Blusun uses certified European materials, German-engineered soles, and sustainable leathers to create barefoot footwear that never compromises on style or foot health.
Shipping & Returns
Pre-Order Shipping: Estimated delivery mid-October 2026. Free UK delivery on orders over £130 with tracked shipping.
Returns accepted within 30 days of receiving your boots — items must be unworn and in original packaging. Visit our Shipping and Returns page for full details.
Need to return an item? Get in touch and we'll help you sort it out. Email us at hello@barefootbrit.shop with your order number and we'll guide you through the process.
Email Us to Arrange a ReturnNot Sure of Your Size? Start Here
Barefoot shoe sizing works differently from standard high-street brands. Measuring your feet in centimetres is the essential first step to getting the right fit.
The Wall & Paper Method
A simple 5-step process you can do at home with just a piece of paper, a pencil, and a ruler.
Room to Move
Adults need 0.8–1.2cm of space; kids need 0.8–1.5cm of growing room beyond their foot length.
Width Matters
Barefoot shoes have wide toe boxes, but width fitting is just as important as length for comfort.
Customer Reviews
Very comfortable, I wasn't sure I would like the feeling of them but I don't notice them on and love the fact that they are not too tight around the top either.
Excellent customer service, swift dispatch and delivery, highly recommended, will definitely buy from them again. Thank you.
Lovely socks and brilliant customer service. Thank you!
Fast delivery
My daughter loves them
Perfect
Super comfortable, I have sensory issues and socks have long been a struggle - I plan to switch over to these completely
Lovely socks… I’m now a total convert to toe socks, they are so comfortable! These are great for summer in trainers, breathable and just the right height. I’m about to buy more.
Helpful friendly and easy
Great socks, comfortable and not restrictive on the toes.
So comfortable,I need more!
Great customer service and so friendly. If you have a problem they are quick to sort it out with ease. Amazing people. Love you all. Thanks for bringing this shop to life. Dan is amazing.
They are great quality and so comfy. My daughter HATES mainstream socks because of the bar across the toe section but absolutely LOVES these. Thank you so much.
Great socks, very comfy. Just need more variety instead of basic black or white
Easy to use. Delivery was good too
Restore Your Feet While You Transition
Barefoot shoes give your feet room and ground feel. These training tools from The Foot Collective rebuild strength and mobility while your feet adapt: 2 minutes a day.
