Xero Prio vs Lems Primal 2 - 2026 Comparison Update

The short answer

If you are shopping today, this is no longer a straight current-product comparison. The Xero Prio is still a current model, while Lems now labels the Primal 2 as discontinued and points buyers to the Primal 3.

That makes the practical decision simple: choose the Prio if you want the thinner, more performance-oriented option. Compare it with the current Primal 3 if you want Lems' widest fit and a slightly thicker, more everyday-oriented platform.

This page keeps the Primal 2 in the title because that is the model readers still search for, but the buying advice below separates the historical shoe from the current replacement.

What changed since the original comparison?

The old article treated both models as current, mixed old and inconsistent Prio insole figures, and turned manufacturer language about zero drop into claims about posture and foot health. It also described one shoe as objectively better for particular activities without enough evidence.

As of 23 August 2026:

• Xero Prio: still current. Xero publishes a 5.5 mm FeelTrue rubber sole, a removable 3 mm insole, a men's size 9 weight of 8.7 oz, and current true-to-size guidance.
• Lems Primal 2: discontinued. Lems still publishes its legacy specs: 9 mm stack, zero drop, 6.9 oz in men's size 10, vegan microfiber and mesh upper, and its WIDEST Natural-Shape fit.
• Lems Primal 3: the current replacement. Lems publishes a 9.5 mm stack, zero drop, 8.6 oz in men's size 10, its WIDEST fit and a redesigned outsole with a wider heel and midfoot footprint.

Prio vs Primal 2 at a glance

FeatureXero PrioLems Primal 2 Current statusCurrentDiscontinued Published sole / stack5.5 mm FeelTrue sole, plus removable 3 mm insole9 mm stack Published weight8.7 oz each, men's size 96.9 oz, men's size 10 Fit signalWider than conventional running shoesLems WIDEST Natural-Shape fit Manufacturer sizingUsual athletic shoe sizeLegacy whole-size range Best reason to choose it nowYou specifically want the current PrioYou find remaining stock or buy used

Which feels more minimal underfoot?

On published geometry, the Prio starts with less rubber underfoot: Xero lists a 5.5 mm FeelTrue sole and a removable 3 mm insole. The old article alternated between 2 mm and 3 mm for that insole; Xero's current Prio page says 3 mm.

The Primal 2's published stack is 9 mm. That does not make it worse, less healthy or unsuitable for balance work. It simply means the two shoes give you a different amount and shape of material under the foot.

If ground feel is the priority, the Prio has the clearer case. If you prefer a little more separation from the ground, the Lems platform may suit you better.

Fit: this is the biggest practical difference

Xero says the current Prio is wider than conventional running shoes and recommends your usual athletic shoe size. That is useful starting guidance, not a guarantee that every foot will fit.

Lems classified the Primal 2 on its WIDEST Natural-Shape last. The current Primal 3 keeps that WIDEST fit and is now sold in half sizes, with Lems saying it generally fits true to size.

If you have a particularly broad forefoot or high-volume foot, the Lems shape is the more obvious model to try first. If you prefer a more secure performance-shoe feel around the midfoot, the Prio's Huarache-inspired heel and instep straps are the more relevant feature.

Training, running and everyday use

Xero positions the Prio as a performance shoe for road running, light trails, walking, gym work and similar mixed use. That is a broader athletic brief than the original Primal 2's everyday positioning.

The current Primal 3 has changed the Lems side of the comparison. Lems now explicitly presents it for all-day wear, weightlifting, cross-training and everyday activity, and the outsole footprint is wider through the heel and midfoot than the Primal 2.

So the old verdict that “Prio is for sport, Primal is only for daily wear” is too crude in 2026. Prio still makes sense when thin sole feel and secure midfoot hold are priorities. Primal 3 is now a more credible current alternative for training as well as everyday wear.

What about zero drop?

Both the legacy Primal 2 and current Primal 3 are published as zero-drop shoes, and Xero builds the Prio on its non-elevated barefoot geometry. That describes heel-to-forefoot geometry. It does not prove that either shoe will correct posture, align the spine, prevent pain or make someone run with a particular strike pattern.

Choose on fit, comfort, sole feel and intended use rather than treating zero drop as a health outcome.

Materials and weather use

The current Prio uses a breathable synthetic/mesh construction and Xero explicitly says it is not waterproof, although the upper is intended to dry relatively quickly after getting wet.

The discontinued Primal 2 used a vegan microfiber and open-weave mesh upper. The current Primal 3 remains vegan with a microfiber and mesh upper. Neither comparison should be read as a waterproof-shoe recommendation.

Price: compare current checkout prices, not the old article

The old comparison hard-coded prices that are no longer reliable. Xero and Lems both run sales and regional pricing, and Primal 2 availability is now residual rather than a normal current retail choice.

If price is deciding the purchase, compare the live Prio price against the current Primal 3 in your region. A discounted old Primal 2 can still be attractive if you already know that shape works for you, but it is not a like-for-like current-model comparison.

Which should you buy?

Choose the Xero Prio if:

• you want the thinner published outsole and more ground feel;
• you want Xero's secure Huarache-inspired midfoot hold;
• you want a current shoe explicitly sold for mixed training and running use;
• the Prio shape and Xero sizing work for your foot.

Look for a Primal 2 only if:

• you specifically want the older Lems model;
• you find remaining stock or a used pair at a price that makes sense;
• you already know the WIDEST Lems shape suits you.

Compare the Prio with Primal 3 if:

• you are making a new purchase in 2026;
• you want Lems' WIDEST fit;
• you prefer the 9.5 mm published stack and wider outsole footprint;
• you want half-size availability that the old Primal 2 did not offer in the same way.

Bottom line

The useful 2026 answer is not “Prio wins” or “Primal wins”. The Xero Prio remains the thinner, performance-oriented current option. The Primal 2 is now a historical comparison point, and the Primal 3 is the Lems shoe most shoppers should actually put beside the Prio today.

That makes fit the first filter, sole feel the second, and activity the third. The old health claims, fixed prices and absolute sport-versus-casual verdicts are not needed to make the decision.

How this comparison was checked

This update was checked on 23 August 2026 against Xero's current Prio product and sizing pages and Lems' current Primal 2 and Primal 3 product pages. Mutable specifications, sizing guidance, availability and product status were re-checked rather than carried forward from the older comparison.