Footwear is one of the highest-frequency contamination transfer points in a cleanroom because it crosses boundaries, contacts floors, and moves continuously. Sterile boot covers help reduce that transfer risk when used with a disciplined gowning sequence and proper change-room controls. Kimtech PURE A5 Sterile Boots with Ties are positioned for ISO Class 5 (and cleaner) programs that want packaging discipline (triple-bagging and vacuum packaging), sterility assurance (gamma, SAL 10^-6), and repeatable donning that minimizes outer-surface contact.

• Footwear barrier control for ISO Class 5+ cleanrooms and associated gowning transitions.
• Aseptic support environments where sterile footwear/overboots are required by SOP (facility- and industry-dependent).
• Change rooms/airlocks where “dirty-to-clean” movement is enforced and footwear is donned before entering higher-grade areas.
• Situations where slip/trip risk and “tie control” are important (boots with ties allow closure tension control).

• Sterility assurance: gamma irradiated with SAL 10^-6 (documentation-supported sterile program).
• Packaging discipline: triple-bagged and vacuum packaged; individually packed pairs support cleaner handling.
• ISO Class 5+ suitability: manufacturer positions the A5 sterile apparel line for ISO Class 5 or higher cleanrooms.
• Low-lint control: fabric cleanliness basis includes Helmke Drum Category 1 (IEST method basis).
• Fit control: ties help stabilize the boot cover and reduce slippage that can create both contamination and safety risks.

Kimtech A5 sterile boots use breathable SMS (100% polypropylene) as the base garment material and are described with a vinyl sole and serged seams in the A5 sterile apparel technical data sheet. For tie versions, closure stability is achieved using long ties that must be controlled during donning to avoid floor contact.

In cleanroom terms, the “build” objective is not ruggedization for outdoor wear—it is reducing particle shedding and preventing cross-boundary transfer while maintaining worker comfort and movement. The garment must be donned without contacting the outside surfaces, and it must remain stable during walking to minimize pumping and rubbing that can liberate particles.

Attribute	Kimtech PURE A5 Sterile Boots w/ Ties
Codes / sizes	12922 (SM/MD)  |  12920 (XL/2XL)  |  88808 (Universal)
Case pack	100 pairs per case
Material	100% polypropylene breathable SMS (manufacturer attribute)
Sterility method	Gamma irradiated; SAL 10-6
Packaging	Triple-bagged and vacuum packaged; sterility indicator (manufacturer attribute)
Cleanroom suitability	Suited for ISO Class 5 or higher cleanrooms (manufacturer attribute)
Expiration dating	5 years (manufacturer attribute)

For cleanroom footwear covers, “performance” is mostly about contamination control and stability: controlling shedding, preventing floor transfer, and maintaining a closed interface with coveralls or lower-leg garments. The biggest performance variable is almost always donning technique, not the catalog spec.

If tie ends contact the floor, or if the outer surface is touched during donning, the footwear barrier can become the contamination source. A structured gowning sequence and a properly designed change room (dirty-to-clean progression) are what convert a sterile boot cover into real process protection.

Kimtech positions the A5 sterile apparel program with triple-bagging and vacuum packaging, including a sterility indicator. For sterile programs, receiving typically verifies packaging integrity, confirms expiry, and confirms the correct code/size is stocked for the gowning area.

If your quality system requires certificates (e.g., Certificate of Conformance and Certificate of Irradiation), Kimtech references certificate availability online for the A5 sterile program. Treat certificates as receiving requirements and qualify them before initial use in critical areas.

These steps are technique guidance intended to reduce contamination risk. Your facility’s SOP governs the official sequence, acceptance criteria, and qualification.

• Tie ends hit the floor: frequent root cause of “sterile item becomes contaminated during donning.”
• Outer surface touched: handling the outside of the boot transfers skin/glove contamination onto the barrier.
• Slip/trip due to loose tying: safety event + increased contamination from rubbing/pumping.
• Boundary discipline gaps: donned footwear placed back onto dirty-side surfaces or walked backward across boundaries.

Alternatives are typically other sterile cleanroom overboots/boot covers positioned for ISO Class 5+ programs. Compare sterility method, packaging discipline (triple-bag/vacuum), sizing/fit stability, and certificate availability—not just price.

• Kimtech PURE A5 Boots with Grasp Ties: selection preference when grasp-tie handling reduces tie-floor contact risk in your gowning flow.
• Sterile overboots from other cleanroom brands (e.g., BioClean/Ansell lines): compare documentation sets and interface requirements with your SOP.
• Non-sterile boot covers: appropriate only when your program does not require sterile packaging/sterility documentation for the area and process.

Kimtech PURE A5 sterile boots are typically selected when a site wants a standardized sterile footwear barrier for ISO Class 5+ cleanrooms and where packaging discipline and expiry dating support controlled entry. They are most effective when the change room is designed for dirty-to-clean progression and when operators are trained to don without contacting outside surfaces or allowing ties to touch the floor.