... 20GP Better Ventilation. ITEM: Premium Cool Gel MatMATERIAL: Hydrogel>= 20% concentration gel padLEAD TIME:35 days for 1st ... summer! Concentration : >=20% , superior quality with stable gel inside ,no shift, no leaking. 3 years quality guarantee ... *140CM,90*180CMOTHERS CUSTOMIZED. COMMON WEIGHT OF GEL WEIGHT OF GEL :30*40CM,AROUND 0.6KG34*54CM,AROUND ... will surely bring you different life style!!!