A perfect fit: how BlackToe Running and PAIRR socks built a partnership rooted in community
Two independent, runner-owned Canadian brands, one homegrown run community — and a sock built for high mileage.
Inspired by the track, repetition, and the rhythm of race-day movement.
The ultimate cooling sock. We designed The 400 with our signature buttery-soft moisture-wicking fabric and added CoolMax fibers and HEXvent ventilation to make the ultimate lightweight, comfortable, moisture-wicking all-white crew sock.
Airflow and comfort where it matters the most.
Product Highlights
- 21 cm crew length.
- 2 Layers of cushioning at heel and toe.
- Contour ribbed arch for no bunching and blisters.
- Elastane transition zone from cuff to foot for multi-directional movements.
- HEXvent ventilation pattern on bottom for added cooling effect.
Product Details
- 56% Coolmax, 34% polypropylene, 10% elastane
- Hand wash or delicate Wash.
- Hang Dry or Tumble Low.
- Do NOT dry clean or bleach!
- Wash MAX temperature: 40°C (104° F).
- Sizing: Small (W5-8/M3-6) Medium (W8.5-11/M6.5-9) Large (W11.5-14/M9.5-12).
Shipping:
Free on all orders over $75.
Please note delivery times are estimates.
- Ontario & Quebec:
Standard (2–4 days): $10, free over $75.
Express (1–3 days): $25, $20 over $75. - Rest of Canada:
Standard (3–5 days): $15, free over $75.
Express (2–3 days): $35, $30 over $75.
Returns:
- 14-day return policy. See our returns & exchanges policy here for more detail.
- One free return per order on qualifying items.
Exchanges:
Free exchanges within 30 days.