Shadowline Adjustable Strap 25 Inch Daywear Full Slip (27304). The Shadowline Adjustable Strap 25 Inch Daywear Full Slip 27304 is accented with scalloped lace edges and adjustable ribbon straps with plastic hardware. Shadowline's Adjustable Strap 25 Inch Daywear Full Slip is made of nylon.