These special Anti-Slip Snow Treads (XL) offer excellent traction on ice and snow. The 12 durable spikes are made from thermoplastic elastomer. Designed using a stretchable material for a unisex fit. They are flexible up to -40°C / -40°F.Mobility Aids are available to assist individuals of all ages who have balance or mobility issues. As we age, our risk of falling increases and the need to prevent falls is a must!