From the Bog Dog team:
The main benefit of our Toe Socks is to prevent rubbing between the toes and allows them to splay naturally - a perfect partner to Altra running shoes. The high performance Coolmax® ToughFX fibres are super soft and durable, so this sock not only feels lovely but is also a hard worker. Made with LYCRA® SPORT fibre ensures a close, comfortable fit. Socks designed and manufactured by HILLY, the UK's premier technical performance sock company for runners - founded by Ron Hill.
Zero cushioning
Technical CoolmaxFX for softness combined with durability
Vented upper and arch grip
Cushioned cuff
Comfort tab to the back
Y heel
63% Polyamide, 34% Polyester (Coolmax ToughFX), 3% Elastane (LYCRA Sport)