The same silicone as the collar, in the same colour. Waterproof and soft in the hand, with a metal snap hook.Three lengths · S 1.9 × 150 cm · M 1.9 × 180 cm · L 2.5 × 180 cmFive colours · the same as the collar, so they matchPersonalise it too · charms of the same size slide onto the strapRinse it under the tap · mud and rain come straight off