Materials:
* Spikes: Tungsten carbide anchored in aluminum and thermoplastic polyurethane (TPU) lugs
* Traction Plates: Dual-compound thermoplastic polyurethane (TPU)
* Harness: Thermoplastic elastomer (TPE)
* Reinforced Eyelets and Toe Bail: Thermoplastic polyurethane (TPU)

Specs:
* Length: 0.21 in / 5.33 mm
* Number of spikes per foot: 10
* Packed Size: 5.75 x 4 x 2.25 in, 52 in³ / 15 x 10 x 6 cm, 900 cm³

Weight (per pair):
* Extra Small: 7.2 oz / 204 g
* Small: 7.5 oz / 214 g
* Medium: 8 oz / 226 g
* Large: 8.3 oz / 236 g
* Extra Large: 9 oz / 255 g

Sizing (Running Shoes):
* Extra Small: Men: 5-6.5 / Women: 6-7.5
* Small: Men: 6.5-8 / Women: 7.5-9
* Medium: Men: 8-10 / Women: 9-11
* Large: Men: 10-12 / Women: 11-13
* Extra Large: Men: 12-14 / Women: 13+

Features:
* Ten integrated spikes per foot easily grip hard surfaces
* Low-profile traction plates keep spikes firmly in place and disperse impact forces evenly across the footwear sole
* Secure elastomer harness ensures an optimized fit and retains elasticity down to -22°F / -30°C
* Patented reinforced eyelets strengthen key stress points
* Toe bail for added comfort and security
* Raised heel tab for easy on and off
* Includes tote sack measuring 8 x 6.75 x 0.25 in / 20 x 17 x 0.6 cm