Tumble in the dryer to lift and separate laundry allowing hot air to flow more efficiently. Softens fabrics naturally and reduces static. Save money and energy. Set of two hedgehogs Measure 2.5 x 2.5 x 3.5″. Soften fabric naturally! Controls static! Hypoallergenic! How do hedgehog dryer buddies work? Hedgehog dryer buddies disperse the wet laundry in the dryer to promote circulation of heat and removal of moisture. The spikes on the hedgehogs gently pamper the fabrics. Suitable for all fabrics that can be tumble dried.