After reviewing several sources, here are some hydrating foundation options for mature skin, along with their positive and negative aspects, and key ingredients:

1. Shiseido Synchro Skin Radiant Lifting Foundation SPF 30

• Key ingredients: Titanium dioxide, mineral oil, beeswax
• Pros: Contains broad-spectrum sun protection, hydrates, and provides anti-aging antioxidants.
• Cons: Expensive.

2. LOréal Age Perfect Radiant Serum Foundation

• Key ingredients: Hyaluronic acid, vegetable glycerin, and Moringa seed extract
• Pros: Moisturizing coverage, contains SPF.
• Cons: Expensive, may not provide enough coverage for some.

3. Ilia True Skin Foundation

• Key ingredients: Hyaluronic acid, aloe vera, and rosehip oil
• Pros: Lightweight, hydrating, and provides sun protection.
• Cons: May not provide enough coverage for some.

4. Kjaer Weis Invisible Touch Liquid Foundation

• Key ingredients: Botanical extracts to soothe sensitive skin
• Pros: Good for sensitive skin, hydrating.
• Cons: Expensive, does not provide sun protection.

5. Laura Mercier Real Flawless Weightless Perfecting Foundation

• Key ingredients: Titanium dioxide and glycerin
• Pros: Good for all skin types, including sensitive, hydrating, and provides some sun protection.
• Cons: None found in the sources.

When looking for a hydrating foundation for mature skin, it is important to consider ingredients that will moisturize the skin, such as hyaluronic acid, aloe vera, and natural oils like rosehip oil. It is also important to find a formula that will glide onto the skin and not grab onto any dryness, and to avoid formulas with silica, talc, or clay, as they can make the skin feel drier. Cream and serum-based foundations are ideal for dry skin, as they can be applied more easily and are less likely to pill the dry skin underneath.