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Heat Therapy™Air Activated HeatwrapDeep Penetrating Relief - 8 Hours Clinically Proven #1 Doctor Recommended Drug Free & Odor Free Portable & Discreet For On-The-Go Relief Patented Technology For Consistent Effective Relief Air-Activated One-Time Use X-Shape Design To Stay In PlaceUses: Provides heat therapy for temporary relief of minor muscular and joint aches and pains associated with overexertion strains sprains and arthritis.