FOX canopies are designed with certain performance specifications in mind. The canopy is a seven cell ram air parachute utilizing I-beam construction with spanwise reinforcement. A low aspect ratio provides consistent openings and stable flight from deep brakes to full flight. The construction of the FOX is reinforced throughout. Dacron lines absorb much of the opening shock associated with no slider deployments. Note: We no longer make the multiple brake settings a standard feature. We have went to a single brake setting we feel is optimal for the canopy in terms of openings, opening surge and rear riser controllability. FOX canopies are available in six sizes ranging from 185 to 315 square feet and are manufactured using ripstop that has a permeability of 0-3 cfm commonly referred to as F-111. There is also a zero porosity top surface option. The ZP option makes the top surface and end cell ribs zero porosity, the bottom surface remains 0-3 cfm. All canopies constructed using ZP fabric must have the Multi installed. However, the canopy doesn't have to be made with ZP to use the Multi. Another option is Vent Technology (Vtec). A FOX VTEC has mesh covered vents in its bottom surface. (You can see the Vtec vents in the photo at left above the BR logo on the bottom surface of the canopy). The recommended suspended weight is a mid-range figure of about a .7 wing loading.