... Cool Gel Mat MATERIAL: Hydrogel>= 20% concentration gel pad LEAD TIME:35 days for 1st 20GP Better Ventilation. ITEM: Premium Cool Gel MatMATERIAL: ... in the world, to enjoy yourself in summer! Concentration : >=20% , superior quality with stable gel inside ,no shift, no leaking. 3 ... layer : Polymer Hydrogel COMMON SIZES: FOR PILLOW :30*40CM,34*54CM,FOR CUSHION:40*40CM,SINGLE BED:60*90CM,90*90CM,75 ...