blueseventy Thermal Swim Socks: 2mm neoprene for cooler swim sessions
blueseventy Thermal Swim Socks add foot coverage for cooler open-water training. The design uses relatively thin neoprene, with the brand aiming to balance insulation and freedom to kick rather than relying on a thick bootie.
Key specifications
- 2mm Yamamoto Super Stretch neoprene.
- Zirconium thermal lining in the foot area.
- Extended length, intended to sit under a wetsuit and reduce water entry.
- Textured underside.
- Two sizes: Small and Large, selected using the brand’s shoe-size chart.
Warmth without a bulky bootie
blueseventy explains that thinner neoprene provides less buoyancy than a thicker sock, helping to preserve a more natural kick. The textured bottom is intended to help protect the feet on rough surfaces and during transition approaches. It should not be treated as equivalent to a protective shoe.
For triathletes
Check the ankle overlap with your wetsuit and try the fit before a longer session. Thermal accessories cannot establish a safe swimming duration: conditions and individual cold tolerance still matter. Confirm the event’s current equipment rules before racing in neoprene socks. This Product Counter introduction draws on the manufacturer’s specification, without claiming an independent warmth or durability test.
Official blueseventy Thermal Swim Socks product details.
Specifications and product image: blueseventy. Product information checked on 13 November 2026.
