With strong adhesion, they can firmly adhere to feet, toes, heels, soles and fingers. FEATURES OF HYDROCOLLOID BLISTER PADS. ✓ 36PCS Hydrocolloid Gel Blister Pads. ✓ The blister pads are made of hydrogel, with rubber coating on the surface, which can prevent pad from water, and hydrogel material is soft, can absorb a lot of water.
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