Use with mast up. Breathable Top Gun polyester. Large YKK zipper and snap closures around forestay and shrouds. Wrap tie seal around mast. Mid-cover main halyard attachment to "tent" the cover up prevents sag and water collection. 1/4 in shock cord in hem exits at the rear of the cover; both ends lace on the underside of the boat (like shoes), up the cover through three sets of cross tie loops and hook together at the bow. The easiest and most secure cover attachment system available. Color: gray (blue or aqua: 2-3 week special order).