The NEMO Disco 30 is a warmer-weather counterpart to the Disco 15, built with the same Spoon shape that widens at the elbows and knees for side sleepers, but with less than half the down fill — 300 g versus 625 g — and a correspondingly higher -1°C limit and 5°C comfort rating for summer and warm shoulder-season nights. The 650 fill-power hydrophobic duck down is RDS-certified, DWR-treated shell fabric adds water resistance, and NEMO's Thermo Gill foot vents let you dump excess heat without unzipping the whole bag.
At 875 g total, it's noticeably lighter than the 15° version and closer to genuine 3-season minimalism, though the single-direction (not two-way) full-length zipper means less flexibility for partial venting than some competitors offer. Internal length is 198 cm, sized for users up to 183 cm, and unlike the 15° model it includes an internal pocket for a phone or small essentials. NEMO's Blanket Fold draft collar and a draft tube along the zipper reduce heat loss where it matters most on cooler nights.