Alginate vs Hydrofiber Dressings: Which to Choose
By Medical Supply Pros | Published: 2026-10-28
Category: Buying Guides
Compare calcium alginate and CMC/alginate dressings for moderate to heavy wound drainage. Learn the key differences and which dressing fits your wound care needs.
Quick Answer
Choose a calcium alginate dressing like Equos for wounds that need conformability and moisture retention. Choose a CMC/alginate hybrid like Maxorb Extra when you need stronger vertical wicking to protect periwound skin.
How They Differ in Absorption
Calcium alginate dressings (e.g., Equos) absorb exudate by forming a soft gel that maintains a moist wound environment. This gel can conform to irregular wound shapes, which helps fill dead space.
Hydrofiber dressings, often a CMC/alginate blend (e.g., Maxorb Extra), wick fluid vertically away from the wound bed. This design reduces the risk of maceration on surrounding healthy skin, especially under compression or in wounds with heavy drainage.
Conformability vs. Skin Protection Trade-Off
Equos Calcium Alginate Dressings are designed to form to the curves of the wound, making them ideal for deep or irregularly shaped cavities. However, because the gel stays in contact with the wound, the periwound skin may need extra barrier protection.
Maxorb Extra wicks fluid vertically, which keeps the wound bed drier and protects the surrounding skin for up to a week. The trade-off is that the dressing is less conformable and may not fill deep wounds as effectively.
How to Decide Between Alginate and Hydrofiber
- Wound shape: Use Equos (calcium alginate) for deep, tunneling, or irregular wounds. The dressing conforms to fill the space. If the wound is shallow and flat, a hydrofiber may be easier to remove.
- Drainage level: Both work for moderate to heavy drainage. For very heavy exudate, Maxorb Extra’s vertical wicking helps keep the wound bed drier. Check the dressing every 2–3 days; if the gel is fully saturated, switch to a more absorbent option.
- Periwound skin condition: If the skin around the wound is fragile or already macerated, choose Maxorb Extra. Its fluid lock reduces moisture contact. Apply a barrier film or cream around the wound when using a conformable alginate like Equos.
Product Facts
- Equos Calcium Alginate Wound Dressings: Equos Calcium Alginate Wound Dressings form to the curves of the wound and keep the wound moist for optimal healing. This makes it a strong choice for deep or irregular wounds where you need the dressing to fill the cavity without leaving gaps.
Equos Calcium Alginate Wound Dressings - Maxorb Extra CMC/Alginate Dressings: Maxorb Extra CMC/Alginate Dressings wick fluid vertically, drawing exudate away from the wound to prevent periwound skin maceration for up to a week. This vertical wicking is critical for wounds with heavy drainage where protecting the surrounding skin is a priority.
Maxorb Extra CMC/Alginate Dressings
Which Dressing Fits Your Wound?
Best for
- Deep, irregular wounds needing conformability: Equos Calcium Alginate
- Heavy drainage with fragile periwound skin: Maxorb Extra
Not for
- Dry wounds or wounds with minimal drainage (both dressings require exudate to activate)
- Superficial wounds where a simple non-adherent pad would suffice
