1,100% silicone matetial 2,soft,comfortable,eco-friendly 3,dustproof,abrasion asistance, durable 4,insulate well silicone baby milk bottle holderfeature:1,100% silicone material,harmless2,safe for children,soft,comfortable3,dustproof,durable,abrasion asistace4,any size and color available5,tempreture range:-90 to 300 centigerade