A surgical stapling apparatus includes a handle, a tool assembly, and a staplecartridge. The handle includes an actuation trigger. The tool assembly isoperatively coupledto the handle. In addition, the tool assembly includes a first jaw member anda second jawmember. The staple cartridge is releasably supported on the first jaw member.The staplecartridge includes first and second buttress materials and a spring memberextending from thestaple cartridge. The spring member is configured to support the secondbuttress materialaway from the first buttress material.
