1. TORSO FIT
- Standing upright, tilt your chin to your chest.
- Locate your C7 Vertabra—the large lump at the base of your neck.
- With flexible tape, measure down the length and natural curvature of your spine to your iliac crest/ the top of your hipbone.
- This measurement in inches is your torso length.
TIP: If you're between 2 sizes, order the smaller size. Still not sure? Contact us.
2. TORSO CHART
We've found most people in these height ranges fall into these torso/pack sizes. That being said, it is always best to measure your torso using the guide above.
If you have questions, or your torso size doesn’t seem to make sense for your height, please contact us.
3. HIPBELT FIT
Use the following method to determine your hipbelt inches, then head to Step 4 to see the hipbelt size you need.
Pant Waist Size + 2".
CURVY HIPS: Smallest part of your waist + 5".
STRAIGHT HIPS: Smallest part of your waist + 3".
Smallest Part of waist + 2".
4. HIPBELT SIZE CHART
Find the hipbelt measurement you calculated in Step 3 on the chart. That will be your hipbelt size.
TIP: If you are on the outer edge of a size, order the larger size. [ Ex: If you are 38", you will notice 38" is the last number of the Medium Hipbelt and the first number of the Large Hipbelt. You would want to order a Large.]
5. SHOULDER STRAPS
J-straps are the traditional straight straps. Best for: Lean or straight builds, kids, curved and narrow shoulders.
S-straps contour body curves. Best for: Women, athletic and bigger builds, square and wide shoulders.
TIP: If you have a short torso but a larger upper body, contact us for a slightly longer strap. If you are very large in the upper body you might need XL shoulder straps, again contact us.
BUILT FOR HOW YOU ADVENTURE.
FULLY CUSTOMIZE THE FABRIC, COLORS & FEATURES ON YOUR PHOTON.
MADE IN THE U.S.A.
FREE U.S. DELIVERY
TUNE-UPS & REPAIRS*
The Photon is the little brother of the CDT. With nearly 35 liters of available space, the Photon is our smallest frameless pack. It’s perfect for dayhikes, backcountry forays, and travel where you’ve got a tight kit and your base weight is sub-12-pounds. As a frameless pack, the maximum comfort load for the Photon is sub 18 pounds. At these loads, the contoured shoulder straps and built-in hip-belt result in a comfortable carry.
Stretch mesh front pocket, adjustable side pockets, and two hipbelt pockets help keep you organized on the trail. The Photon comes standard with a roll top. A removable (and replaceable) foam back panel adds padding a little rigidity to this frameless pack. NEW! FOR 2022: The CDT’s hipbelt pockets are now larger to accommodate most modern smartphones, and the side pockets are now made of robic.
The Photon can be purchased without a hipbelt [-$10] for those looking to lighten up, and the back panel and shock cord can be removed for further weight savings.
AT A GLANCE
PHOTON [WEIGHT BY SIZE | OZ]
VOLUME: 2,150 CU IN | 35 L
MAX LOAD: 18 LBS | 8.2 KG
The little brother of the CDT, the Photon is perfect for day hikes and backcountry forays. If you’re rocking a tight kit with a sub-12-pound base weight, this pack is for you.
- Internal Pad Holster
- Contoured Padded Hipbelt
- Contoured Shoulder Straps
- Hipbelt Pockets
- Front Mesh Pocket w/ Shock Cord
- 400 Robic Adjustable Side Pockets
- Roll Top Extension Collar
- Adjustable/Bellowed Side Pockets
- 400d Robic Bottom Panel
- Ice Axe/Pole Retention Loops
- Side/ Top Suspension Straps
- ULA 400 Robic
- Foam Pad (1.9 oz)
- Sternum Strap
REC. MAX LOAD: SUB 18 LBS
REC. BASE WEIGHT: SUB 12 LBS
TOTAL VOLUME: 2,150 CU IN | 35 L
BREAKDOWN (CU IN):
- Main Body: 1,225
- Front Mesh Pocket: 225
- Left Side Pocket: 115
- Right Side Pocket: 115
- Extension Collar: 400
- Left Hipbelt Pocket: 60
- Right Hipbelt Pocket: 60
Q: HOW DO I USE MY SLEEPING PAD IN CONJUNCTION WITH THE PHOTON? WHAT PADS WORK THE BEST?
A: Just about any lightweight pad (foam or inflatable) can be used for additional support and padding inside the Photon. Three quarters and full length pads that can be folded (as opposed to rolled) work the best. If you are using an inflatable mattress, deflate, then fold it into 1/3’s or 1/5’s before inserting. We also supply a ¼ inch piece of open cell foam with the pack that works very well for those of you not carrying a sleeping pad.
Q: CAN ANYTHING BE REMOVED TO SHAVE MORE WEIGHT?
A: Absolutely. The foam back panel can be removed (1.9 oz), as well as the sternum strap (2.0 oz), the front shock cord (0.6 oz), the webbing can be trimmed to size, and the pack can be ordered without a hipbelt (4.0 oz.)
Q: WHAT DOES "RECOMMENDED BASE WEIGHT" MEAN?
A: “Base weight” refers to the total weight of all gear carried — including the weight of your ULA backpack. This weight also includes things like water bottles and food stuff sacks, but not the weight of water and food as this will vary during each trip. Knowing your base weight will help you determine which suspension system will best handle your load on the trail.
Q: CAN A WATER BOTTLE FIT IN THE SIDE POCKETS?
A: Each side pocket can accommodate two 1-Liter ‘Big Slam’ style bottles. In general most people can reach back and retrieve a bottle, drink, and return the bottle to the pocket without removing the pack. The top of the side pockets are angled for easier access.
Q: HOW DOES THE TOP OF THE PACK STAY CLOSED?
A: The top of the pack closes like a dry bag (also known as a rolltop) very similar to what river runners use to create a water resistant seal for their gear bags. The back of the collar is slightly taller than the front. Once you are packed, the collar can be rolled down upon itself to effectively create a barrier to water penetration. Once rolled, each side of the collar can be buckled to the sides of the pack or the two yellow buckles on the top can also be fastened to each other.
As for access, once the collar is rolled and fastened shut, you would need to unbuckle the compression straps and unroll the collar to access the inside of the pack. However, the roll-top only needs to be rolled shut when the weather dictates. If the sky is dry, the collar can simply be folded forward. Vertical compression can still be achieved by buckling the collar to the sides of the pack.
ULA 400 ROBIC
…the toughest stuff ounce for ounce we’ve ever seen. Highly tear and abbrassion resistant, reinforced with a ripstop weave to increase tear strength and stitch holding capabilities. 100% Robic Nylon fabric with three-pass Teflon DWR and a three-pass PU Coating, making it highly water resistant.
…one of the most popular high-performance technical fabrics in the industry. Low stretch, abrasion resistant, and a high denier face fabric strike a near-perfect balance between weight and durability. These multi-layered laminated fabrics are waterproof to 200+ PSI.