The lightest pad in Peregrine’s line-up; the Aerie UL was developed to  maximize comfort and warmth in the lightest package possible. Featuring an Aorta Two Valve Inflation System to easily adjust and fine-tune to your level of comfort and insulated with PrimaLoft Black Hi-loft insulation. A propietary application of the PrimaLoft greatly extends the insulating properties and power and cuts heat sink significantly, keeping things nice and toasty for extended 3-season use into the early spring and late fall. I-beam construction provides good stability and larger outer beams reduce the chance of rolling off the pad during the night. Loaded with features and a minimalist pack size, this pad will cover your needs for nearly anything nature can throw at you.