4 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the shape of your feet to resist blisters and chafing RHS (Royal Horticultural Society) endorsed - the only gardening footwear endorsed by the Royal Horticultural Society High-grade rubber exterior provides extra toughness and makes for a 100% waterproof garden boot; rear pull loop for easy on/off Breathable Airmesh lining wicks away humidity and perspiration, and allows air to travel throughout the boot while keeping water out; comfort rated from subfreezing to 65 °F/18 °C Shock-absorbing insole for comfortable extended wear; women’s last is specially designed to support the female foot; high traction outsole is self-cleaning for added stability on slick surfaces