YEAR ROUND ENERGY COST SAVER: Our door stoppers work effectively for all season use keeping cold or warm air in, which can save you up to 20 percent on your yearly energy bills THICKER for BETTER BLOCKING: Door seal's 2" thick foam ensures it's an effective under door noise stopper, door wind blocker, door light blocker, door odor blocker, and under door bug stopper ADJUSTABLE DRAFT STOPPER: Suitable for most doors with widths between 30" to 36" and gaps from 0.25" to 1.5" high. IMPORTANT: Measure door gap and width BEFORE buying to ensure our door sweep fits EASY to INSTALL: Apply our door bottom seal strip in 4 steps. Measure door width (30" to 36") and gap (up to 1.5" high). Cut foam tubes, insert into polyester cover and close, then slide under door NON DAMAGING: Unlike many door stoppers for bottom of door that require adhesive or tacks, the no damage slide on design of our bottom door seal makes for the ideal apartment noise blocker for renters LONG LASTING DURABILITY: The door gap blocker can withstand frequent opening and closing of doors without tearing or fraying. Compatible with all flooring including carpet, vinyl, tile, and wood SAFE for KIDS and PETS: While unsafe materials such as glass beads and tacks are used in other door draft stoppers for bottom of door, ours has memory foam tubes and a soft cover for added safety