Osprey Seral 4 Lumbar Hydration Pack - Dustmoss Green

Riders looking for a low-profile lumbar pack with integrated hydration need look no further than the Seral 4.

This slim waistpack features a 1.5-liter bladder with our updated high-strength magnetic coupling for improved hose management even in rough terrain. The Seral 4 has enough storage capacity for ride essentials, such as a spare tube, CO2 and multi-tool and, of course, snacks. Constructed with high-quality bluesign-approved recycled high-tenacity nylon with a PFC-free DWR coating.

Technologies

Lumbar Carry - For riders who require hydration or gear storage while riding, but prefer the off-the-back carry and minimalism provided by lumbar packs.
Ride Stability - Their bike-specific, angled hipbelt and compression straps provide stability and comfort by keeping the pack close to your body. This is created by a breathable airmesh wrap hipbelt that contours over the hipbone, Osprey's ErgoPull cross-body waist strap closure system that pulls the pack into the lumbar and side compression straps that pull the load close to your body, providing the most comfortable, secure and stable carry.
Included Reservoir - A dedicated hydration compartment stores an included 1.5 L lumbar reservoir for short to medium rides and compresses for stable carry, while the hose magnet attaches to the bite valve for easy access while riding.
Sustainable Materials - Constructed with PFC-free recycled bluesign-approved nylon; a sustainable build that's tough and durable to endure years of riding.

Features

AirScape backpanel with contouring lumbar wrap provides maximum stability
Included Osprey Hydraulics 1.5 L lumbar reservoir by Hydrapak
Magnetic hipbelt bite valve attachment
Large zippered main compartment with reservoir sleeve
Main compartment tool organization and internal zippered pocket
Blinker light attachment with reflective graphic

Specifications

Volume244 IN3 / 4 L Dimensions19H X 32W X 11.5D CMWeight0.423 KGFabricMain: Bluesign-approved recycled 600D PET polyester, PFC-free DWR
Accent: Bluesign-approved recycled 400D high-tenacity nylon, PFC-free DWR
Bottom: Bluesign-approved recycled 400D high-tenacity nylon, PFC-free DWR
Size Guide

Fit should not be compromised for any other considerations. Body shape and sizing varies from customer to customer. Not every customer will fit every pack. Adjustable packs allow customers to fine-tune the fit for optimal carry performance.

Hipbelt Sizing

To determine hipbelt size, measure around the hips at the iliac crest, not the waist. The padded portion should wrap well around the hips, leaving a gap of 3" to 6" between the tips of both hip pads when securely tightened.

Fixed Hipelt Sizing

XS 24-25" / 60-114 cm
S 24-25" / 60-114 cm
S/M 26-45" / 65-114 cm
M 27-48" / 69-121 cm
M/L 28-50" / 70-127 cm
L 29-55" / 72-140 cm
O/S 25-50" / 64-127 cm